I did an upgrade from ubuntu 13.04 to 13.10. Everything went ok till the end when i got this message "the sistem is running in low graphics mode". I read something about it. Some say the problem is with the graphic card (ati amd radeon). I try to install the drivers but it didn´t work. wrong drivers? i don´t know, I am new in ubuntu and I am a little lost, anybody has the same problem?